28311554 has 4 divisors (see below), whose sum is σ = 42467334. Its totient is φ = 14155776.

The previous prime is 28311553. The next prime is 28311557. The reversal of 28311554 is 45511382.

28311554 = 3071² + 3072² + 3073².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 27321529 + 990025 = 5227^2 + 995^2 .

It is not an unprimeable number, because it can be changed into a prime (28311553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7077887 + ... + 7077890.

Almost surely, 2^28311554 is an apocalyptic number.

28311554 is a deficient number, since it is larger than the sum of its proper divisors (14155780).

28311554 is a wasteful number, since it uses less digits than its factorization.

28311554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14155779.

The product of its digits is 4800, while the sum is 29.

The square root of 28311554 is about 5320.8602687911. The cubic root of 28311554 is about 304.7810091547.

The spelling of 28311554 in words is "twenty-eight million, three hundred eleven thousand, five hundred fifty-four".